Electric-arc lamp



No. 749,018. 4P'IEIITEJ) JAN. 5, 1904. E. H. BELDEN. ELECTRIC ARC LAMP.

APPLICATION FILED AUG.13, 1900. RBNEWED MAY 11. 1903.

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No. 749,018. PATENTED JAN. 5, 1904. E. H. BELDEN.

ELECTRIC ARG LAMP.

APPLICATION FILED AUG.13,1900. RBNEWED MAY 11, 1903.

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PATENT OEEICE.

EDWARD H. BELDEN, OF FORT WAYNE, INDIANA, ASSIGNOR TO WESTING- HOUSE ELECTRIC &; MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent N o. 749,018, dated January 5, 1904.

Application filed August 13, 1900. Renewed May 11,1903. Serial No. 156.696. (No model.)

To all whom it may concern,.-

Beit known that I, EDWARD H. BELDEN, a citizen of the United States, residing at Fort Wayne, in the county of Allen, in the State of Indiana, have invented certain new and useful Improvements in Electric-Arc Lamps; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in lo the art to which it appertains to make and use the same, reference-being had to the accompanying drawings, which form part of this specification.

My invention relates to electric-arc lamps having closed arc-chambers and containing cases for the controlling mechanism.

The object of my present in vention is to provide a closed arc-lamp of great simplicity of construction, having but few parts so arzo ranged that the controlling mechanism may be readily detached from its inclosing case and removed therefrom as one piece and having its armature provided with broad bearings to keep the moving parts in perfect alinement under all conditions of service.

My invention consists of a novel arrangement of series magnet-coils and a rocking armature operatively connected with the movable carbon and arranged in the upper portion of a containing cylindrical casing, a

novel arrangement of the resistance in combin-ation with a sealed arc-chamber and proper clutch-feeding mechanism.

Similar reference-numerals indicate like parts throughout the several views of the drawings, in which- Figure 1 is a view, partially in side elevation and partially in section, of a lamp embodying my invention, the outer globe being 4o partially broken away. Fig. 2 is a plan view of the magnet-coils and armature and their supporting means. Fig. 3 is a plan view of the resistance-coils and their supporting means. Fig. 4is a side elevation of the mechanism shown in Fig. 2. Figs. 5 and 6 are detail views of the brackets for supporting the magnet-coils, one of the said brackets being partly broken away. Fig. 7 is an enlarged detail view of a portion of the means for sup- 5o porting the resistance.

In Fig. 1 is shown the sheet-metal casing 1, which incloses the working parts of the lamp and is provided at its upper end with adetachable top or cap 2 and at its lower j end with a removable base-plate 30, to which the mechanism in the lower end of the lamp is secured.

The top of the casing 1 has a ring 3, on which the cap 2 rests and to which it is secured. The inner face of the ring 3 is pro- 6o vided at diametrically opposite points with lugs 4 and 5, to the former of which is secured the arm 12 of a bracket 6, and to the latter of which is secured one end of the bifurcated arm 13 of a bracket 7.

The bracket 6 is provided near its ends with circular openings 9, which receive the cores 10 of the magnet-coils 8. The projecting pole-piece ends of the cores being of larger diameter than the holes 9, they serve, in con- 7o junction with screws 1l, to clamp the coils 8 between the brackets 6 and 7.

The bracket 6 is provided with apertured lugs 15 at the edge opposite the arm 12, between which is pivoted the head 14 of a le- 75 ver 21. To the end of said lever 21 which is remote from the head 14 is pivoted the cylinder ot' a dash-pot 17, the piston of which is supported upon the arm 13. Between the dash-pot and the head 14 the lever 21 is piv- 8o otally attached to the upper end of a rod 16, upon the lower end of which is supported the carbon guide and holder, to be hereinafter described.

To the outer edge of the head 14 is rigidly 85 attached, by means of proper lugs 18, an armature 19, having circular openings 2O of such diameter as to permit the pole-pieces of the magnet-cores 10 to project therethrough without contact.

The rod 16 projects through the opening in the bifurcated arm 13 and makes an adj ustable screw-threaded connection with the upper end of a tubular carbon-guide 22, which is provided with an inner sleeve 23, having a 95 rigidlyconnected carbon holder 24. The sleeve 23 forms a chamber for a flexible cable 25, which is coiled therein and has its respective ends secured to awasher in the tubecap 26 and to the carbon-holder 24, thereby loo forming an electrical connection between the carbon-guiding tube 22 and the upper carbon 27, which is securely clamped in the holder 24.

My improved arrangement of resistance is as follows: The lower portion of the case 1 is provided with an internal strengthening-ring 28, having pendent lugs 53, to the outer faces of which are respectively secured insulatingblocks 54, having lateral perforations 55 to receive and loosely support the resistancecoils 29. The said resistance is thus compact in arrangement, secure against derangement in use, and is perfectly insulated, with no danger of short-circuiting by reason of contraction or expansion thereof. Mounted in the lower part of the lamp is a curved plate 30, having a plurality of pendent lugs 31, to which a iiat plate 32 is secured. The plate 30 has a central circular opening, in which a hollow casting 33 is so fixed as to leave a small annular air-space 34. The casting 33 is closed at its top by a loosely-mounted cap 35, having a central opening to loosely receive the carbon-tube 22, the said opening being of sufficient diameter to leave a small annular outlet adjacent to said tube for the escape of the gases formed by the are, which pass upward into said casting through an annular opening 36 in the plate 37, which closes the lower end of the said casting 33. The ring-clutch 33 for the feeding carbon, the lower -carbon bracket 39, the springhanger bracket 40 for the arc-inclosing globe 41, the casing 1, and the outer globe 54 are each and all constructed and arranged identically as set forth in a pending application for a patent on an improved arc-lamp, tiled by me on the 6th day of August, 1900, Serial No. 26,032, and therefore require no more specific description here.

The operation of my improved lamp may be briefly stated as follows: The current enters the lamp at the positive binding-post 45, through the leading-in wire 46, and passes thence through the flexible conductor 47, magnet-coils 8, the conductor 47a, the cap 2 6 of the tubular guide 22, the cable 25, the movable carbon 27, the lower carbon 48, carbon-brackets 39, connecting spring-plate 50, wire 51, coiled resistance 29, the conductor 52, binding-post 49, and leading-out wire 56. When no current is passingl through the lamp, the weight of the tubular guide 22 will depress the outer end of the lever 21, to which it is connected, and will thus raise the armature 19 to the upward limit of its movement, which is determined by a fixed stop 57 on the outer end of the arm 12. This movement releases the holding-clutch 38 and lets the movable carbon down bygravity into contact with the adjacent end of the lower carbon. When the current enters the lamp and energizes the magnets 8, the armature 19 is of course drawn downward, and thus causes the lever 21 to elevate the guide-tube 22 by means of the rod 16, thereby actuating the clutch mechanism as described in said pending application and causing it to again engage the said feeding-carbon and to raise the same until the proper arc is formed. As the carbons burn away and thus lengthen the arc, the energy exerted by the magnet upon the arm* ature will be proportionally weakened, thereby permitting the desired descent of the guide-tube22. This descentcontinuesasthe carbons burn away until the clutch trips, thereby allowing the upper carbon to feed downward and shorten the arc, the strength of the magnet being thus increased, so that it actuates the armature to strike the proper arc. This action of the lamp-controlling mechanism is continued during the life of the carbons.

Obviously when it is desired to remove the controlling mechanism of the lamp for repairs or other purpose it can readily be done by simply removing the two screws which secure the arms 12 and 13 to the lugs 4 and 5, respectively, after which the said mechanism may be conveniently lifted out of the casing 1 as a single piece or dropped downward and removed through a door in said casing.

I desire it to be understood that variations in the details of construction shown which do not materially change the mode of operation and result are within the scope of my invention.

I claim as my invention- 1. In an arc-lamp, the combination with carbon-feeding coils and two brackets between which said coils are clamped, of a supporting-frame to which said brackets are detachably fastened, and a carbon-operating lever pivotally supported by one of said brackets and provided with an armature for said coils.

2. In an arc-lamp, the combination with carbon-feeding coils, two brackets and cores for said coils serving in conjunction to support the coils, of a supporting-frame to which said brackets are detachably fastened and a carbon-operating lever pivotally supported by one of said brackets and provided with an armature for said coils.

3. In an arc-lamp, the combination with carbon-feeding coils, two brackets between the inner ends of which the coils are clamped, of a circular supporting-frame to which the outer ends of the brackets are detachably fastened and a carbon-operating lever pivoted to one of said brackets and having an armature for said coils.

4. In an arc-lamp, the combination with carbon-feeding coils, two brackets and magnet-cores serving to clamp said coils between the inner ends of said brackets, of a supporting-frame to which the outer ends of said brackets are detachably fastened, a carbonoperating lever pivotally supported upon one of the brackets and provided with an armature for said coils.

5. In an arc-lamp, the combination with a carbon-feeding coil having a core that pro- ZIO jects beyond one of its ends and two brackets between the inner ends of which the coil is clamped, of a supporting-frame to which the outer ends of said brackets are detachably fastened and a carbon-operating lever pivoted to one of said brackets and having an armature provided with a hole to receive the projecting core end.

6. In an arc-lamp, a carbon-feeding magnet and two brackets having inclined inner ends between which the magnet is clamped, of a supporting-frame to which the outer ends of the brackets are detachably fastened and a carbon-operating lever pivoted to one of said brackets and having an armature for said magnet.

7. In an arc-lamp, the combination with a pair of magnet-coils, cores therefor each having one end of greater diameter than that of the opening in the coil, and two brackets between the inner ends of which the coils are clamped by said cores, of a supporting-frame to which the outer ends of said brackets are detachably fastened and a carbon-operating lever pivoted to one of said brackets and having an armature provided with holes to receive the projecting ends of lthe magnet-cores.

8. In an arc-lamp, the combination with a pair of magnet-coils and a pair of brackets of unequal length having inclined inner ends between which said coils are clamped, of a supporting-ring to which the outer ends of said brackets are detaehably fastened and a carbon-operating lever pivoted to the shorter bracket, a dash-pot member supported byone end of said lever, an armature mounted upon the other end thereof and a carbon-holder rod connected to thelever between its fulcrum and the dash-pot.

9. In an arc-lamp, the combination with a casing having supporting-rings adjacent to its ends each provided with depending lugs, of brackets detachably fastened to the lugs of the upper ring, carbon-feeding mechanism supported by said brackets, perforated insulating-blocks fastened to the lugs of the lower ring and annular resistance-coils supported in the preforations of said insulating-blocks.

10. In an arc-lamp, the combination with a casing and carbon-feeding mechanism supported therein,of a resistance-supporting ring having depending lugs, perforated insulating-blocks fastened to said lugs and annular resistance-coils supported in the perforations of said blocks.

11. In an arc-lamp, the combination with a casing having an internal ring at its upper end provided with lugs, of brackets detachably fastened to said lugs, magnet coils clamped between the inner ends of said brackets and having projecting cores, a lever pivoted to one of said brackets and having an armature at one end, a dash-pot at the other end, and a carbon-holding tube connected to the lever between its fulcrum and the dashpot.

12. In an arc-lamp, the combination with a supporting ring having pendent lugs, of brackets detachably fastened to said lugs, a magnet clamped between said brackets and a carbon-operating lever pivotally fulcrumed in one of said brackets and carrying upon one end an actuating-armature and upon its other end the movable carbon.

13. Arc-lamp-controlling mechanism comprising a pair of supporting-brackets, a ring for detachably supporting said brackets7 an energizing-magnet rigidly supported by said brackets, and an operating-lever pivotally fulcrumed in one of said brackets and carrying upon one end a rocking armature in cooperative relation to said magnet and carrying upon its other end a movable carbon and one member of a dash-pot.

14. Controlling mechanism for arc-lamps romprisiuga pairof magnet-coils having fixed protruding pole-pieces, supporting-brackets in which said coils are detachably mounted in an inclined position, and an operating-lever fulcrumed on one of said brackets and carrying a rocking armature in cooperative relation to said pole-pieces upon one end thereof and carrying upon its other end a feedingcarbon and one member of a dash-pot.

Signed by me at Fort Wayne, Allen county, State of Indiana, this 10th day of August,A.D. 1900.

EDWARD H. BELDEN.

Witnesses:

CHARLES F. PFEIFFER, NELLIE FISHER. 

